Twin Peaks is one of my favorite series, I have a poster of it on my wall.
I think the series is perfection up until mid season two, when it falls off a cliff. The characters are some of the best ever on television, and the series has a feeling unlike anything else. I agree with what was said earlier, it feels like a real place that you could visit.
It does pick up in the last few episodes, and the final episode or two is as good as the early ones. I like the prequel film, but it doesn't feel like the series, I only suggest it to people who like other Lynch projects.